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Date: Mon, 26 Nov 2018 14:11:20 +0100
From: Christoph Hellwig <hch@lst.de>
To: Ming Lei <ming.lei@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>, linux-block@vger.kernel.org,
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Subject: Re: [PATCH V12 09/20] block: use bio_for_each_bvec() to compute
 multi-page bvec count
Message-ID: <20181126131120.GA6757@lst.de>
References: <20181126021720.19471-1-ming.lei@redhat.com> <20181126021720.19471-10-ming.lei@redhat.com>
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Looks fine:

Reviewed-by: Christoph Hellwig <hch@lst.de>

Nitpick below:

> +{
> +	unsigned len = bv->bv_len;
> +	unsigned total_len = 0;
> +	unsigned new_nsegs = 0, seg_size = 0;
> +
> +	/*
> +	 * Multipage bvec may be too big to hold in one segment,
> +	 * so the current bvec has to be splitted as multiple
> +	 * segments.
> +	 */

Please use up all 80 chars in a line.